Matrix isolated barium monofluoride: Assembling a sample of BaF molecules for a measurement of the electron electric dipole moment
Z. Corriveau, R. L. Lambo, D. Heinrich, J. Perez Garcia, N. T. McCall, H. -M. Yau, T. Chauhan, G. K. Koyanagi, A. Marsman, M. C. George, C. H. Storry, M. Horbatsch, E. A. Hessels
A cryogenic neon solid doped with barium monofluoride (BaF) is created on a cryogenic substrate using a stream of Ne gas and a high-intensity beam of BaF molecules produced in a cryogenic helium-buffer-gas laser-ablation source. The apparatus is designed for eventual use in a measurement of the electron electric dipole moment (eEDM). Laser-induced fluorescence is observed from transitions up to the $B\,^2Σ_{1/2}$ state. The number of BaF molecules found to be present in the solid and addressable with this laser transition is approximately 10$^{10}$ per mm$^3$, which is of the same order as the total number of BaF molecules that impact the substrate during the hour of growth time for the solid. As a result, an eventual eEDM measurement could have continual access to an accumulation of an hour's worth of molecules (all of which are contained within a 1-mm$^3$ volume and are thermalized into the ground state), compared to beam experiments which study the molecules from a single ablation during the millisecond-timescale of their passage through a much larger-scale measurement apparatus. The number of BaF molecules observed in the doped solid matches the target value for our planned eEDM measurement.
Accurate calculation of the interaction of a barium monofluoride molecule with an argon atom: A step towards using matrix isolation of BaF for determining the electron electric dipole moment
Global isotopic analysis of hyperfine-resolved rotational spectroscopic data for barium monofluoride, BaF
Pomona College（波莫纳学院）；Gottfried-Wilhelm-Leibniz-Universität, Institut für Physikalische Chemie and Elektrochemie, Lehrgebiet A（哥特弗里德·威廉·莱布尼茨大学，物理化学与电化学研究所，A教学组）
Calculation of the local environment of a barium monofluoride molecule in an argon matrix: A step towards using matrix-isolated BaF for determining the electron electric dipole moment
本文计算了嵌入氩基质中 BaF 分子的局部环境，发现取代四个 Ar 原子最具优势，且低温下阻碍分子迁移与转动的势垒足以固定其位置和方向，为 EDM$^3$ 合作组精密测量电子电偶极矩提供了关键基础。
Specular reflection of polar molecules from a simple multi-cylinder electrostatic mirror: a method for separating BaF molecules produced in a buffer-gas-cooled laser-ablation source from other ablation products
Neutral Barium in Solid Neon: Optical Spectroscopy and First Excited State Lifetime
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara（意大利国家核物理研究所费拉拉分部）；Department of Physics and Earth Science, University of Ferrara（费拉拉大学地球与物理科学系）；Istituto Nazionale di Fisica Nucleare, Sezione di Padova（意大利国家核物理研究所帕多瓦分部）；National Quantum Science and Technology Institute（国家量子科学与技术研究所）；Department of Physics and Astronomy, University of Padua（帕多瓦大学物理与天文学系）
A cryogenic apparatus with a rotatable substrate for matrix isolation spectroscopy of BaF in neon crystals down to 3.2 K
Istituto Nazionale di Fisica Nucleare（意大利国家核物理研究所）；University of Ferrara（费拉拉大学）；University of Padua（帕多瓦大学）；National Quantum Science and Technology Institute（国家量子科学与技术研究所）
Statistics and systematics of electron EDM searches with BaF
Nikhef, National Institute for Subatomic Physics（尼赫夫国家亚原子物理研究所）；Department of Physics and Astronomy, LaserLaB, Vrije Universiteit（自由大学物理与天文学系激光实验室）；Institute for Theoretical Physics, University of Amsterdam（阿姆斯特丹大学理论物理研究所）
Novel spin-precession method for sensitive EDM searches
我们展示了一种自旋进动方法来观察和分析所有的超精细水平之间的多层次的相干性在$X ^2Σ^+,N=0$基态的一氟化钡（$^{138}$ Ba $^{19}$ F）。该信号是敏感的状态准备拉比频率和外部电场和磁场施加在搜索一个永久的电偶极矩（EDM）。在所获得的干涉频谱中，电场和拉比频率变得与电火花加工同时可观察。该方法减少了系统偏差和用于这种精确测量的辅助测量的数量。
